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1956 J. BRICKLEY ROCK GRINDING MILL 3 Sheets-Sheet 1 Filed May 15, 1953JL. F

& wm v N w u aN INVENTOR ATTORNEYS 1956 J. L. BRICKLEY ROCK GRINDINGMILL 3 Sheets-Sheet 2 Filed May 15, 1955 JL .Brz'ckley INVENTORATTORNEYS Feb. 21, 1956 BRICKLEY 2,735,627

ROCK GRINDING MILL Filed May 15, 1953 3 Sheets-Sheet 5 INVENTOR BY W.

ATTORNEYS United States Patent ROCK GRINDING MILL James L.Brickley,Spokane, Wash.

Application May 15, 1953, Serial No. 355,370

Claims. (Cl. 241-270) This invention relates to a rock grinding mill forreducing rock or stone into fine particles or a powder form upon thepassage of the rock -or stone through the machine in a continuousoperation.

Another object of the invention is to provide a rock crushing orgrinding mill which isrugged in construction and well adapted forproduction at a relatively low cost and which is capable of grindingstone or rock in a continuous operation.

Further and more limited objects of the invention will appear as thedescription proceeds and by reference to the accompanying drawings inwhich similar parts are designated by similar reference characters-inwhich Fig. l is a view in end elevation of a mill embodying the featuresof my invention.

Fig. 2 is a'horizontal sectional view taken on the line 22 of Fig. l andFig. 3 is a vertical sectional view taken on the line 3-3 of Fig. 1.

Referring now to the drawings my mill consists essentially of a lowerframe or casing generally rectangular in shape and having front and rearWalls 11 and 12 and end walls 13 and 14 which are formed of steel plateswelded together at their abutting edges. Disposed adjacent the cornersof the casing are four vertically disposed channel irons 16, 17, 18 and19 which are welded to the adjacent walls. Secured to the frame 20 atone side thereof is a spout 21 having side walls 22 and 23 and a bottomwall 24 between which are disposed vertically disposed bafiles 24a.Disposed intermediate the corner posts and welded to the front and rearwalls 11 and 12 are four vertical channels 25, 26, 27 and 28. Disposedat the front and rear of the frame and extending from front to rearthereof is a channel 29. A pair of horizontal transverse bars 30 connectthe corner posts and the next adjacent intermediate vertical channels.The front and rear vertical channels are connected at the top by fourtransverse channel bars 31, 32, 33 and 34 which are welded or bolted tothe adjacent channel at the top thereof. Disposed inwardly of the wall11 and extending parallel thereto and spaced therefrom is a Wall 110which is welded to the adjacent wall. Extending at right angles to thewall 11a are a plurality of reinforcing partition plates 11b which arewelded at their ends to the frame. The frame or hammer 20a is dividedinto a plurality of rectangular openings by transverse andlongitudinally extending partitions Zilb all of such parts being weldedat their points of intersection. This frame resembles an egg crate inplan view and has no bottom. This frame is mounted for reciprocationwithin the frame or casing 10 and strikes against a bottom member oranvil A supported by the walls 10 and 11a and reinforcing plates 11b.This bottom plate or anvil A is also welded to all intersecting oradjacent walls so as to withstand the shocks instant to the crushingoperation. The reference character 35 designates a pair of L-shapedbrackets which are welded to the horizontal bar 29 at the sides2,735,627 Patented Feb. 21, 1956 2 of the frame and'project inwardlytherefrom as shown inFig. 3. Each bracket 35 has vertically disposedslot therein which receives one end of a crossbar 36. A similar pair'ofbrackets 35a are secured to connecting bars 30 at the sides'of'the framewhich slidably receive therein the opposite ends of a pair of bars 36.There are four coil springs '37 which surround bolts 37a on transverseplates 37b on the frame 20 at their lower ends. The upper ends of suchsprings 37 engage under 7 one of the outer ends of the crossbars 36 asshown in Fig. 3. These springs'tend to urge the frame 20 downwardly asseen in Fig. 3 and the tension of the springs may be increased by bolts38 which are adju'stably-mounted in the brackets '35and35a.

Welded to the iwallll aand extending parallel thereto in spaced relationis a U-fshap'ed member 39 which extends substantially the full lengththereof and which forms with the wall 11: a trough 40 the purpose ofwhich will later appear.

Bolted to the upright channels Hand 25 are a pair of brackets 41 and 42in which is journalled a shaft 43 to one end of which is non-totatablysecured a grooved pulley 44 which is'drive'n from a suitable source ofpower and to the other end of whichis'secured a crank or pitma'n45to'which is connected one end of the pitman rod or link 46 the purposeof which will later appear.

Secured to the'top of the frame 20 at opposite ends thereof are a pairof transverse plates'47 each of which has an upstanding Web portion 48and secured to each web-portion are a pairof parallel spaced arms 49 and59 in which is journalled agrooved pulley or sheave 51. Pivotallysecured'to the horizontal channel 29 is a link 52 the 'outer'end'ofwhich is pivotally connected with the pitman rod 46. 'The referencecharacter 53 and 53a designate a pair of beams or arms which arepivotally mounted intermediate their ends on the tops of horizontalchannels 32 and 33 respectively as seen most clearly in Fig. 1.Pivotally secured to one end of the arm 53 is a link 54 and pivotallysecured to the other arm 53a is a link 54a. The lower ends of each ofthe links 54 and 54a. are pivotally connected with the link 52intermediate the ends thereof by a pin 55. The other end of the link 52is pivotally connected to the pitman rod 46 by a pin 46a. Secured to theend of the arm 53 remote from the link 54 is a wire rope 56 whichextends around the sheave 51 and has its opposite ends secured to thecrossbar 31. Secured to the end of the arm 53a remote from the link 54ais a wire rope 56a which extends around the other sheave 51 and has itsopposite ends secured to the crossbar 34 as shown most clearly in Fig.1.

It will now be seen that when the shaft 43 is rotated the pitman rod 46will rock the bar 52 to impart a reciprocatory motion to the frame 20.The frame 211 is lifted against the compression of the coil springs 37the tension of which can be increased when desired. As the entire frame20 is thrust downwardly by the coil springs 37 it will be seen that anyparticles of rock disposed between the anvil A and the frame 20 will becrushed into smaller particles or reduced to powdered form. As the frame20 is open at the bottom particles of stone lying within the pocketscreated by the partitions 20a and 20b will flow out on the top of theanvil A as the frame 20 is lifted. The grinding or cutting surface areprovided by the bottom edges of the partition 20:: and 20b.

The manner of operation of the mill is as follows. The mill is set up sothat the surface of the anvil is disposed at an angle to the horizontaland particles of stone are fed to the mill by a suitable feeder (notshown) which delivers the same to the inlet trough or spout 21 and wateris also fed into the spout and across invention.

the anvil in the desired volume and rate depending upon the size of theparticles of stone and the fineness desired for the finished product.The power shaft 43 is rotated at rather igh Speed of the order about 400R. P. M. or higher depending upon the size of particles desired which isControlled largely by increasing or decreasing the speed of the machine.Water flowing across the anvil removes the finer particles which flowout through the trough 40 and thence to screening or'grading equipment(not shown). Onefeature of my mill resides in the use of the heavy coilsprings which serve to impart a rapid pending action to the hammer thespeed of which may be readily 'varied without greatly increasing thehorse power required. 7

It will now be clear that I have provided a rock grinding or crushingmill which will accomplish the objects 'of the invention as hereinbeforestated. Various changes may be made in the detailsjof'construction andarrangement of parts without departing from the spirit of my Theembodiment of the invention herein disclosed is therefore to beconsidered illustrative and not in a limiting sense as the invention islimited only in accordance with the scope of the appended claims.

What is claimed is:

l. A rock crushing mill comprising a lower frame having a solid wallforming an anvil on which stone is crushed, an upper open frameoverlying said lower frame and mounted for reciprocation relativethereto and adapted to crush particles of stone lodged on said anvil,spring means urging said upper frame downwardly into rock crushingcontact with said anvil, powered means including a crank connected atone end to said anvil for intermittently raising said upper frameagainst the pressure of said spring means and then quickly releasing thesame whereby particles of rock may be crushed on said anvil in acontinuous operation by series of rapidly recurring sharp blows.

Arqsk r s i as defined i claim 1 iniwh h said open frame is in the formof an open sided grid having a plurality of closely adjacent openingsthrough which particles of rock to be crushed are fed in a continuousoperation.

3. A rock crusher comprising an anvil and a hammer overlying said anvilfor imparting a series of rapidly recurring sharp blows to saidanvil,spring means urging said hammer downwardly toward said anvil and poweredcrank means for imparting a pounding motion to said hammer in oppositionto said spring 'means, said hammer being in the form of an open sidedgrid having a plurality of closely spaced vertically disposed openingstherein extending over the entiresurface thereof and through which therock to be crushed is fed.

4. A rock grinding mill comprising a fiat surfaced anvil, and asuperposed hammer, power mechanism to intermittently lift the hammer,and a spring device to increase the speed and inertia of the hammer onthe impact down stroke, the hammer being in the form of an open latticedgrid, the spring device being securely fixed in place relative to theanvil and under compression against the hammer in motion.

5. The mill of claim 4, in which the power mechanism includes a rotatingshaft, crank, and connecting rod attached to an oscillatable beam or armabove the hammer.

References Cited in the file of this patent UNITED STATES PATENTSGermany May 27, 1895

